Watch Karen O, Pharrell Williams, U2 Perform at 2014 Academy Awards

Tonight (March 2) is Oscar night, and as the film industry gathers in Los Angeles to celebrate the best movies from the past year, a number of musicians are also taking the stage. This year's nominees for Best Original Song — Karen O, Pharrell Williams, U2 and Idina Menzel — are all performing in addition to special appearances from Bette Midler and Pink.